CN215170418U

CN215170418U - Die-casting aluminum piston

Info

Publication number: CN215170418U
Application number: CN202121754960.9U
Authority: CN
Inventors: 刘伦昌; 张光波
Original assignee: Chongqing Micro Arc Metal Surface Treatment Technology Co ltd
Current assignee: Chongqing Micro Arc Metal Surface Treatment Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-14
Anticipated expiration: 2031-07-30

Abstract

This scheme belongs to piston processing technology field, concretely relates to die casting aluminum piston. Including the piston body, piston body from the top down includes top, head and skirt portion in proper order, the top is the concave top shape, be equipped with the annular on the head and scrape the oil groove, it includes horizontal plane, arcwall face and inclined plane to scrape the oil groove, be equipped with the guide way on the piston body, the guide way import is established on the arcwall face, the guide way export is established on the side wall of piston body skirt portion, it has the separation blade to articulate in the guide way. The oil groove of scraping in this scheme makes the oil on the cylinder wall scrape to the cambered surface in to in the guide way import from the cambered surface gets into the guide way, then flow to between the skirt portion of piston and the cylinder wall from the export of guide way, should scrape the oil groove and can scrape off and the drainage to the skirt portion of piston with adnexed machine oil on the cylinder wall effectively, when saving machine oil, can also lubricate the skirt portion of piston.

Description

Die-casting aluminum piston

Technical Field

This scheme belongs to piston processing technology field, concretely relates to die casting aluminum piston.

Background

The automobile piston is more important than the central part of an automobile engine when the engine is started. The automobile piston is used for bearing gas pressure and driving the connecting rod to drive the crankshaft to rotate through the piston pin; the oil scraping groove of the existing gasoline engine piston is only in chamfer transition with the outer wall of the piston, and when the piston moves upwards, lubricating oil on the inner wall is easily brought into a combustion chamber for combustion, so that the content of HC in tail gas is increased.

The application number is CN201821607224.9 discloses a piston of oil groove is scraped in area, including the piston body, the bottom of piston body ring bank is scraped the oil groove through the setting and is connected with the skirt section of piston body, the external diameter of piston body ring bank is less than the external diameter of piston body skirt section, scrape the oil groove and constitute from last first arc portion, oblique straight face portion and the second arc portion of connecting according to the preface down, first arc portion sets up to the inside sunken of piston body, and the second arc portion sets up to the outside arch of piston body, the radius of first arc portion is 0.4-0.8mm, and the radius of second arc portion is 1.5-2.5 mm. The radius of first arc portion is 0.6mm, and the radius of second arc portion is 2 mm.

The oil groove of scraping in this scheme comprises first arc portion, straight face portion and second arc portion to one side, and in the piston motion process, should scrape the oil groove and can not scrape the fluid that adheres to on the cylinder wall completely, piles up machine oil in scraping the oil groove, and it is unsatisfactory to scrape the oil effect, has to burn machine oil and smoke the phenomenon, and not only piston motion's stability receives the influence, has influenced the life of piston moreover greatly.

SUMMERY OF THE UTILITY MODEL

The scheme provides a die-casting aluminum piston to solve the problem that a large amount of engine oil can be stored between an oil ring scraper and a cylinder wall when the engine oil on the cylinder wall is stored.

In order to reach above-mentioned purpose, this scheme provides a die-casting aluminum piston, including the piston body, the piston body from the top down includes top, head and skirt portion in proper order, the top is the concave top shape, be equipped with the annular on the head and scrape the oil groove, it includes horizontal plane, arcwall face and inclined plane to scrape the oil groove, be equipped with the guide way on the piston body, the guide way import is established on the arcwall face, the guide way export is established on the side jade of piston body skirt portion, the articulated some separation blades that have a bit of guide way in the guide way, the guide way is equipped with the lug that is used for preventing the separation blade upwards to overturn.

The principle and the beneficial effects of the scheme are as follows:

1. scrape the oil groove by the horizontal plane, arcwall face and inclined plane are constituteed, make oil on the cylinder wall scrape to the arcwall face in, and get into the guide way in the guide way import from the arcwall face, then flow to between the skirt part of piston and the cylinder wall from the export of guide way, should scrape the oil groove and can scrape adnexed machine oil on the cylinder wall effectively and drain to the skirt part of piston, avoid machine oil to pile up in scraping the oil groove, avoided burning machine oil and emit black cigarette phenomenon, the stability of piston motion obtains improving simultaneously, and the machine oil of drainage to the skirt part of piston can also lubricate the skirt part of piston.

2. The guide groove is internally provided with a one-way overturning baffle, so that in the process of rapid movement of the piston, a mechanism entering the guide groove can be prevented from being thrown out to an oil scraping groove and then being brought into a combustion chamber by the piston for combustion, and the content of HC in tail gas is increased.

3. The compression ratio of the gasoline engine can be adjusted by arranging the top of the piston to be a concave top.

Further, a fiber reinforced alloy ring is cast into the head of the piston body. The fiber reinforced alloy ring can improve the strength and the wear resistance of the piston.

Further, the annular is from last to including first annular, second annular and third annular down, first annular top is equipped with the heat-insulating groove. The heat insulation groove can enable heat at the top of the piston to be transmitted to the first ring groove, the second ring groove and the third ring groove less, so that the temperature of the whole piston is reduced, and the service life of the piston is prolonged.

Further, the piston body is a circular table with a small upper part and a large lower part. Because the part is heated more on the piston, so the piston inflation volume is big end down, and sets up the piston body into big end down's round platform, can make and remain even, suitable clearance throughout between cylinder and the piston, and then makes the performance effect of cylinder better.

Further, the piston body is made of die-cast aluminum. The die-casting aluminum has light weight, can reduce the reciprocating inertia force of the piston, and further prolongs the service life of the connecting rod crankshaft.

Further, the surface of the skirt part of the piston body is treated by tinning, galvanizing or coating graphite. The cylinder pulling phenomenon can be avoided when the lubrication is poor, and the abrasion of the skirt part is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a sliding groove and a guiding groove of the embodiment of the present invention.

Fig. 3 is a schematic structural view of a heat insulation groove according to an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

the reference numbers in the drawings of the specification include: piston body 1, top 2, skirt portion 3, first annular 4, second annular 5, third annular 6, scrape oil groove 7, guide way 8, separation blade 9, fibre reinforced alloy ring 10, heat-insulating tank 11.

The embodiment is basically as shown in the attached figure 1:

a die-casting aluminum piston comprises a piston body 1, the piston body 1 sequentially comprises a top part 2, a head part and a skirt part 3 from top to bottom, the top part 2 is in a concave top shape, an annular groove and an oil scraping groove 7 are arranged on the head part, the oil scraping groove 7 comprises a horizontal plane, an arc-shaped surface and an inclined plane, a guide groove 8 is arranged on the piston body 1, an inlet of the guide groove 8 is arranged on the arc-shaped surface,

as shown in fig. 2:

scrape oil groove 7 and constitute by horizontal plane, arcwall face and inclined plane for oil on the cylinder wall is scraped to the arcwall face, and gets into in the guide way 8 from the 8 import of guide way in the arcwall face, then flows out to between the skirt portion 3 of piston and the cylinder wall from the export of guide way 8, should scrape oil groove 7 and can scrape off and drain the skirt portion 3 of piston with adnexed machine oil on the cylinder wall effectively, when saving machine oil, can also lubricate the skirt portion 3 of piston.

The outlet of the guide groove 8 is arranged on the side wall of the skirt part 3 of the piston body 1, a separation blade 9 is hinged in the guide groove 8, and the guide groove 8 is provided with a convex block for preventing the separation blade 9 from turning upwards. In the process of rapid movement of the piston, the mechanism entering the guide groove 8 can be prevented from being thrown out into the oil scraping groove 7 and then being brought into the combustion chamber by the piston for combustion, so that the content of HC in the tail gas is increased.

The compression ratio of the gasoline engine can be adjusted by arranging the top 2 of the piston to be a concave top.

The head of the piston body 1 is cast with a fibre reinforced alloy ring 10. The fiber reinforced alloy ring 10 may improve piston strength and wear resistance.

As shown in fig. 3:

the annular is from last to including first annular 4, second annular 5 and third annular 6 down, and first annular 4 top is equipped with heat-insulating tank 11. The heat insulation groove 11 can enable the heat at the top of the piston to be transmitted to the first ring groove, the second ring groove and the third ring groove less, so that the temperature of the whole piston is reduced, and the service life of the piston is prolonged.

The piston body 1 is a round table with a small upper part and a big lower part. Because the part is heated more on the piston, so the piston inflation volume is big end down, and sets up piston body 1 into big end down's round platform, can make and remain even, suitable clearance throughout between cylinder and the piston, and then makes the performance effect of cylinder better.

The piston body 1 is made of die-cast aluminum. The die-casting aluminum has light weight, can reduce the reciprocating inertia force of the piston, and further prolongs the service life of the connecting rod crankshaft.

The surface of the skirt 3 of the piston body 1 is treated by tin plating, zinc plating or graphite coating. The cylinder pulling phenomenon can be avoided when the lubrication is poor, and the abrasion of the skirt part 3 can be reduced.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A die-cast aluminum piston, includes piston body (1), its characterized in that: piston body (1) from the top down includes top (2), head and skirt portion (3) in proper order, top (2) are the concave top shape, be equipped with the annular on the head and scrape oil groove (7), it includes horizontal plane, arcwall face and inclined plane to scrape oil groove (7), be equipped with guide way (8) on piston body (1), the import of guide way (8) is established on the arcwall face, guide way (8) export is established on the side wall of piston body (1) skirt portion (3), it has separation blade (9) to articulate in guide way (8), guide way (8) are equipped with the lug that is used for preventing separation blade (9) upwards to overturn.

2. A die cast aluminum piston as set forth in claim 1 wherein: the head of the piston body (1) is cast with a fiber reinforced alloy ring (10).

3. A die cast aluminum piston as set forth in claim 1 wherein: the annular is from last to including first annular (4), second annular (5) and third annular (6) down, first annular (4) top is equipped with heat-insulating groove (11).

4. A die cast aluminum piston as set forth in claim 1 wherein: the piston body (1) is a round table with a small upper part and a large lower part.

5. A die cast aluminum piston as set forth in claim 1 wherein: the piston body (1) is made of die-cast aluminum.

6. A die cast aluminum piston as set forth in claim 1 wherein: the surface of the skirt part (3) of the piston body (1) is treated by tinning, galvanizing or coating graphite.